Unable to move drone object after adding background image in Blender 2.80
Starting with 2.80, adding a background image actually adds an empty object that displays the image. This object can be selected and moved like any other, even if it is set to draw its image behind scene objects.

I would suggest making the empty non-selectable. In the outliner, select the empty. If the cursor is not visible in the restiction columns, you can enable it in the filter menu by clicking on the funnel in the header. You can also find the same option in the objects visibility properties.